More than three days after 19-year-old Aisha Khan vanished, Overland Park police officials said Monday that they were no closer to figuring out what happened to her.

Authorities have searched nearby parks, woods and a golf course. They’ve looked at video surveillance footage from nearby businesses. And they’ve canvassed every house within a mile of the University of Kansas Edwards Campus, where Khan was studying for a college final when she called her sister to report a man harassing her.

None of that has turned up any evidence of what happened to Khan, Overland Park Police Chief John Douglass said during a press conference Monday afternoon.

The only possible sighting involves some construction workers who reported seeing a woman matching Khan’s description leaving a building. She was alone, the workers told police.

“We are looking at it as a missing person case, and we are treating it like an abduction,” Douglass said.

Khan’s parents tearfully pleaded for whoever took their daughter to return her. If that person brings her back safe “I would forgive him,” said her mother, Fozia Khan.

Her father, Amanat Khan, said he is praying for everyone who is praying for the family, and he asked people to “keep praying for us.”

Aisha Khan, who got married July 31, lives in Olathe and attends Johnson County Community College. She and her husband, Waseem Khan, had planned to take a delayed honeymoon after she finished her finals.

She was studying at an outside table in an alcove at the Edwards Campus for a Friday afternoon final at the community college, authorities said. The Edwards Campus, at 127th Street and Quivira Road, did not have security video, authorities said.

Khan called her sister late Friday morning about the man harassing her but got her sister’s voice mail. Khan left a message, Douglass said.

“You hear her say he may have tried to kiss her or something like that, and she hit him and ran away,” Douglass said.

When her sister arrived at the campus to give Khan a ride home, she found Khan’s unattended book bag and cell phone.

Ten detectives, 50 officers, four FBI agents and security officers from the Edwards Campus and the community college have been working the case, Douglass said. Volunteers also helped search on horseback. Areas targeted included the Overland Park Municipal Golf Course, Quivira Park, Stohl Memorial Park and adjacent areas, Douglass said.

Khan, who was born in New York and grew up in the United States while also visiting relatives in Pakistan, is 5 feet 2 inches tall and weighs about 120 pounds. She has brown eyes and brown hair and was last seen wearing a yellow and black shirt, black sweat pants and a black head scarf.

Anyone with information is asked to call the TIPS Hotline at 816-474-8477 or police at 913-344-8703. A $10,000 reward is being offered.